1HE IRRIGATION AGE. 325 



The figures in the outer column indicate the average depth of 

 application per week during the growth of the crop, which is given as 

 sixty-five weeks. Concerning the value placed upon the rainfall, 

 Schuyler and Allardt say, ''the rain may at times exceed the quantity 

 applied artifically, but irrigation is performed the same as usual, not- 

 withstanding, in order that there shall be no break in the continuity 

 of the waterings." 



